Unit Specs
- Stock #17454
- Year2026
- ManufacturerForest River
- Make Forest River
- ModelRiverStone
- Floorplan421FK
- Type Fifth Wheel
- ConditionNew
- Length44' 0"
- VIN4X4FRS837T0005320
- Price $158,999.00
- Need to know your payment? Use our RV Loan Calculator!
- Sleeps4
- Water Capacity (Fresh)79 gal
- Water Capacity (Black)40 gal
- Water Capacity (Grey)120 gal
- Slideouts6
Looking to buy a 2026 Forest River RiverStone Fifth Wheel RV?
This 2026 Forest River RiverStone 421FK is outfitted with all the features you need for happy camping. By owning this 2026 Forest River RiverStone 421FK, you’re joining the Forest River family! The sleep capacity allows you to bring up to 4 along on your travels in this rig. You won’t believe how big this RV feels with 6 slides. Go longer without filling up thanks to the 79 gallon fresh water tanks.
2026 Forest River RiverStone 421FK Features
2026 Forest River RiverStone 421FK Specifications
Dimensions
Height
13' 4"
Length
45' 0"
Width
8' 6"
Weights
Dry Weight
18,331 lbs
GVWR
24,000 lbs
Hitch Weight
3,270 lbs
Payload Capacity
5,669 lbs
Capacities
Refrigerator Capacity
18 cu ft
Sleep Capacity
4
Water Capacity - Black
40 gal
Water Capacity - Fresh
79 gal
Water Capacity - Grey
120 gal
Exterior
# Awnings
2
# Axles
2
# Doors
1
# Slides
5
Hitch
Fifth Wheel
Electrical
# A/C
2
A/C Spec
15,000 BTU High Performance Quiet Cool A/Cs with Heat Pumps
2026 Forest River RiverStone 421FK Literature
Call:
810-670-2950
Stock #: 17454
Dealer Info
![Tradewinds RV Center]()
Unit Specs
- Stock #17454
- Year2026
- ManufacturerForest River
- Make Forest River
- ModelRiverStone
- Floorplan421FK
- Type Fifth Wheel
- ConditionNew
- Length44' 0"
- VIN4X4FRS837T0005320
- Price $158,999.00
- Need to know your payment? Use our RV Loan Calculator!
- Sleeps4
- Water Capacity (Fresh)79 gal
- Water Capacity (Black)40 gal
- Water Capacity (Grey)120 gal
- Slideouts6
Looking to buy a 2026 Forest River RiverStone Fifth Wheel RV?
Email Dealer
Request More Info on this 2026 Forest River RiverStone 421FK Offered for sale by Tradewinds RV Center
Want S'more?
Sign up for the RVUSA Happy Camper Newsletter!
Everything about RV life delivered directly to your inbox. The hottest RVs, tips & tricks, recipes, travel destinations, new gadgets & much more!
Related Searches:
Similar Units From Tradewinds RV Center
Recent stories from our Blog
Related Rental Searches:
Similar Units for Rent
2026 Forest River RiverStone 421FK Gallery